I have a XPS15 9550 and spilled tea (chinese tea without any sugar) onto the laptop back in early August!  I ordered a certified refurbished motherboard from eBay and installed it.  I have the following issues:

1. It has taken very long time to complete the POST and it has trouble doing the restart. 

2. I am also having issue with my wifi as the connection keeps dropping out.  This issue is repeatable both at home and work.

I suspect that I have to do some changes to the BIOS setting and I would like to find out if I can get a copy of the correct BIOS setting for this laptop?

I also have a working XPS 13 9350 and I am not sure if I can use the BIOS setting for this 9350 laptop for reference and make changes to the BIOS setting for 9550?